#include <iostream>
#include <stdio.h>
using namespace std;
int main() 
{
	double r,zj,peri,s,pi;
	pi = 3.1415926;
	cin >> r;
	zj = r * 2;
	peri = pi * 2 * r;
	s = pi * r * r;
	printf("%.4lf %.4lf %.4lf",zj,peri,s);
	return 0;
}
